Cooperative Research Units
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Survival of boreal toads across multiple life stages in relation to habitat, grazing, disease, and climate


July 2017 - June 2020


The boreal toad (Anaxyrus boreas) was once widespread and common, but has suffered substantial population declines in the Rocky Mountain region. As a result, the boreal toad is a Species of Greatest Conservation Need (NSS1, Tier 1) in Wyoming. Factors believed to be contributing to boreal toad decline include disease, habitat loss and alteration, pollution, and changing weather. The overall project objective is to develop a better understanding of boreal toad survival at multiple life stages in relation to habitat, grazing management practices, disease, and climatic variables. Project partners include the Wyoming Game and Fish Department and the U.S. Forest Service. Results will clarify risks to the population sustainability of boreal toads in Wyoming and beyond, and the specific mechanisms underlying survival across life stages.


Current Staff

Federal Staff: 3

Masters Students: 17

Phd Students: 4

Post Docs: 3

University Staff: 4

5 Year Summary

Students graduated: 17

Scientific Publications: 52

Presentations: 107



Funding Agencies

  • Wyoming Game and Fish Department


Wyoming Cooperative Fish and Wildlife Research Unit Cooperators

  1. U.S. Fish and Wildlife Service
  2. U.S. Geological Survey
  3. University of Wyoming
  4. Wildlife Management Institute
  5. Wyoming Game and Fish Department